1. Empa, Laboratory for Hydrogen & Energy, Swiss Federal Laboratories for Materials Testing and Research, Überlandstrasse 129, CH-8600 Dübendorf, Switzerland, Laboratory for Neutron Scattering, ETH Zurich & Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland, GKSS-Research Center Geesthacht GmbH, WTP, Building 59, Max-Planck-Strasse 1, 21502 Geesthacht, Germany, Institute of Nanotechnology, Forschungszentrum Karlsruhe, P.O. Box 3640, D-76021 Karlsruhe, Germany, Institute for Energy Technology, P.O....